What can you do if the non-custodial parent will not file his taxes because it will go to child support?
A person who does not file a tax return is eventually audited
and then contacted by the IRS and state tax agents.
The willful failure to pay one's taxes is a federal felony.
In some instances the IRS will file the non compliant person's
taxes for them based on previous filings and then bill the person
for failing to file income tax returns and pay any income taxes
that may have been due plus interest and penalties.
In most such case refunds are non existent.
What is the net gain? Either way, that parent gains nothing
financially as there is no return. The money remains in government
You can report him to the IRS. See the link for more